<!DOCTYPE HTML>
<html lang="en-US">
<head>
	<meta charset="UTF-8">
	<title></title>
	<style type="text/css">
.main {
	background:#D6D6D6;
}

.left {
	background:#E79F6D;
}

.right {
	background:#7BD;
}

/* core layout css */
.main {
	float:left;
	width:100%;
}

.left {
	float:left;
	width:190px;
	margin-left:-100%;

}

.right {
	float:left;
	width:230px;
	margin-left:-230px;

}
}
.in{margin:0 230px 0 190px}

</style>

	</head>
<body>
<div id="bd">
              <div class="main"><div class="in">test11111111111</div></div>
              <div class="left">test11111111111</div>
              <div class="right">test11111111111</div>
         </div>
</body>
</html>